Fellas,
I now have two usrps up and running on two different computers. However, am back to getting a stream of straight “U”s when running the TX_USRP on either of the machines. When running the RX_USRP on the desktop (first install) I get a stream of straight “D”s. When running the RX_USRP on the desktop (second install) I get a stream of straight “0”s.
Both configs are using two cores, with time_slot_ns = 1200000
I await your response and hope that I can get this going soon! So close to having the USRPs seeing each other!
Thanks again as always,
Kevin
Hi,
What do you mean with first or second install?
The screen output "O" means overflows and is the receive equivalent to the transmiter's underflow. That means you should follow the same procedure as before.
First try to tx and rx to/from a file with a timeslot of 1 ms. Choose the cores appropiately. Make sure you run as root and keep the background tasks to a minimum. The play with the blocking option in the app file and reduce the time slot length.
Also, let mw know in detail what steps did you follow and what kind of response did you obtain.
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Ismael,
Sorry I had a grammar error there. 1st install meant is on my desktop (i7) and 2nd install is on my *laptop* (i5). So I have an install of ALOE on each machine.
I will get to changing the parameters and let you know what happens!
Thank you,
Kevin
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Ismael,
I have run the to/from (tx&rx) file. It works every time. I have the timeslot set to 1ms and blocking = 0. I let the receiver work for about a minute and got an increasing number of blocks while Total Errors and BER remained 0. Around 41,400 blocks I started getting errors and a small BER. The errors increased from there. When I ran the tx/rx file on my laptop I let the tx file run for a longer period of time and errors in the RX did not start occurring until 86400 total blocks. So, I assuming that errors are occurring when there are no more packets to be analyzed/received.
So, tx/rx_file work fine on both of my machines.
When running the USRPs I have been manipulating the time_slot_ns value. While changing the timeslot for the TX, if the value is too low I will get this:
“[error at sink, ts=12272]: sent 1452/1920 samples
Module sink returned error from work() function. Trying a clean stop ……”
If the timeslot is to high I get the Us for underloaded.
I have the RX_USRP file running on my laptop, timeslot = 1ms. Blocking = 0, I get an “O” every 25s or so. But it is running I assume.
I will continue to change the blocking on the TX and see what happens. In the event that I get both running without any “u”s or “O”s, what output should I be looking for?
Thank you,
Have a great weekend,
Kevin
From: flex...@googlegroups.com [mailto:flex...@googlegroups.com] On Behalf Of Ismael Gomez
Sent: Friday, September 06, 2013 12:24 PM
To: flex...@googlegroups.com
Subject: Re: [ALOE] Two USRPS but more errors
Hi,
To view this discussion on the web visit https://groups.google.com/d/msgid/flexnets/CAAC4g6u1pFmYD2OBfS5i04Jaivuae0b_RMcnC7kb4uik%2BP%2BPww%40mail.gmail.com.
Ismael,
I have run the to/from (tx&rx) file. It works every time. I have the timeslot set to 1ms and blocking = 0. I let the receiver work for about a minute and got an increasing number of blocks while Total Errors and BER remained 0. Around 41,400 blocks I started getting errors and a small BER. The errors increased from there. When I ran the tx/rx file on my laptop I let the tx file run for a longer period of time and errors in the RX did not start occurring until 86400 total blocks. So, I assuming that errors are occurring when there are no more packets to be analyzed/received.
So, tx/rx_file work fine on both of my machines.
When running the USRPs I have been manipulating the time_slot_ns value. While changing the timeslot for the TX, if the value is too low I will get this:
“[error at sink, ts=12272]: sent 1452/1920 samples
Module sink returned error from work() function. Trying a clean stop ……”
I have the RX_USRP file running on my laptop, timeslot = 1ms. Blocking = 0, I get an “O” every 25s or so. But it is running I assume.
I will continue to change the blocking on the TX and see what happens. In the event that I get both running without any “u”s or “O”s, what output should I be looking for?
Ismael
Good news! With blocking all on and the timeslot set to 870ms it works! I actually trigger a response from the receiver. I verified that the transmitter is working with a spectrum analyzer as well. However, I am not in the same position as Ofir is.
I am continually letting the transmitter run. Then will run (‘r’) the receiver and it immediately kicks back saying
Total blocks: 1 Total errors: 1 BLER=1
Total blocks: 1 Total errors: 1 BLER=1
Total blocks: 1 Total errors: 1 BLER=1
So they do see each other. Is the next move to adjust the AGC ? Ofir and I are in the same spot I believe.
Thanks
As always,
Kevin
From: flex...@googlegroups.com [mailto:flex...@googlegroups.com] On Behalf Of Ismael Gomez
Sent: Monday, September 16, 2013 11:38 AM
To: flex...@googlegroups.com
Subject: Re: [ALOE] Two USRPS but more errors
Hi kevin, sorry for the late answer.
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Glad to here these good news!
Yes, the next step is to manually adjust the agc as i explained to ofir.
Regards
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Ismael,
I have followed your directions to the letter, but am having some issue it seems with the logging. I ran the “cmake..” and then made the “reports” directory within the “rtdal_lnx” directory. I ran the receiver and it stopped again immediately after with the same output as in my last email. There is no output saying “Writing to log file ./reports/synchro_pss.log...done”. After I hit CTRL+C to exit, I do however get this:
“[rtdal_log_flush():106]: Error opening file ./reports/ctrl.log: fopen: No such file or directory
[rtdal_log_flush():106]: Error opening file ./reports/synchro_pss.log: fopen: No such file or directory
|….
|….
|….”
…… with more of the same errors but different directories that should apparently be there.
Not sure what is going on here and why the directories aren’t being made. Ideas?
Thanks,
Kevin
From: flex...@googlegroups.com [mailto:flex...@googlegroups.com] On Behalf Of Ismael Gomez
Sent: Monday, September 16, 2013 11:38 AM
To: flex...@googlegroups.com
Subject: Re: [ALOE] Two USRPS but more errors
Hi kevin, sorry for the late answer.
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